Eraser attachment for typewriters



Jan. 24, 1939.

' F. w. sTou-f ERASER ATTACHMENT FOR TYPEWRITER S Filed June 24, 1938INVENTOR BY 3 5 ATTORNEY Patented Jan. 24, 1939 UNITED STATES PATENT]oFFIca nlmsna ATTACHMENT FOR TYPEWRITEI/ES Frederick William Stout, NewYork, N. Y. Application June 24, 1938, Serial No. 215,761 4 Claims. (01.24c--20c) Thisinvention relates to new and useful improvements in aneraser attachment for typewriters.

The invention has for an object the construction of an attachment whichis characterized by a vacuum rubber cup adapted to be pressed intoposition upon the side of a typewriter, or desk, or other article offurniture, and automatically to .maintain its position thereon. Inconjunction with this vacuum rubber cup it is proposed to characterizethe attachment by a chain or cord or other similar support, connectedwith the vacuum cup and with an eraser for holding the eraser so that itis readily accessible for use.

Another object of this invention resides in so constructing theattachment that it may easily be removed from the side of a typewriteror the desk or other furniture, without marring or inluring the-partsfrom which it has been removed.

Another object of the invention is the construction of a device asmentioned which is simple and durable and whichmay be manufactured andsold at a reasonable cost.

Fur further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming'a material part of this disclosure:

Fig. 1 is' a perspective view of an eraser attachment for typewritersconstructed according to this invention.

Fig. 2 is a side elevational view of Fig. 1.

Fig. 3 is a fragmentary enlarged sectional 'view showing specificallythe details of the suction cup.

Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 3.

Fig. 5 is a similar view to Fig. 3 but illustrating another form of theinvention.

The eraser attachment for typewriters, ac-

cording to this invention, includes a typewriter eraser l0 supported ona bracket II. This bracket comprises merely a strand of wire bent at itscenter H and having its free ends ll engaged through the conventionalcentral hole ll) of the typewriter eraser. on the end of a chain I! by aconnector l3. This connector is attached to the lower end of the chainand is formed with an opening l3 through which the bracket ll extends.

The chain 12 has another connector l3 at its upper end which engagesupon a hook l4 supported on a vacuum rubber 'cup l5. This vac- Thebracket II is supported uum rubber cup has a concave front side l5 whichmay be pressed against a smooth fiat surface to expel the airso that therubber cup maintains its position under the weight of the atmosphere. I

The hook. I4 is threadedly engaged upon the outer end of a stud l6 whichis molded into the rear end portion ofthe vacuum cup I5. A small airpassage l'l extends from the curvedsurface l5 through the middle of therubber cup and the middle of the stud l6, Atone point along "the lengthof the stud thereis aradially extending branch passage I! which isalignable with a passage Il formed radially inthe shank portion of thehook M in one turned position thereof.

The arrangement is such that when the hook I4 is normally tightlyengaged on the stud I6 the passages Fl and ll are out of line with eachother and so the air connection from the interior of the rubber cupwiththe atmosphere is incomplete.

The vacuum cup I5 is formed with a radially inclined annular face l5This inclination increases the gripping quality of the suctioncup whichis especially important when the cup is attached to other surfaces thanglass.

The eraser attachment for typewriters is used as follows: I

The cup I5 is merely pressed against the side of a typewriter or theside of a desk so thatit automatically maintains its position. Theeraser It may be used whenever required. To remove the attachment it ismerely necessary to break away the vacuum cup l5 from the article uponwhich it is mounted. If the hold is too tight the hook l4 may be turnedso that the passages Il and ll align with each other. This immediatelyreleases the vacuum within the cup and the cup may easily be removedfrom its position.

In Fig. 5 the threaded-member I4" is provided with a hexagon flange l4for turning same. Member I4" is also threaded on the outside to permit alock nut I4 to secure a suitable conhector of an eraser holding chain orcord, to be While I have illustrated and described the 5 preferredembodiments of my invention, it is to be understood that I do not limitmyself to the precise constructions herein disclosed'and the right isreserved to all changes and modifications coming within the scope of theinvention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

1. An eraser attachment for typewriters, comprising an eraser, a bracketfor releasably supporting said eraser, a chain attached at one end tosaid bracket, a support member attachedon the other end of'said chain, avacuum rubber cup for engagement on a smooth surface, a stud molded intothe material of the cup and having a projecting shank upon which saidmember is mounted, and an air passage extending from the,

inner face of the vacuum cup through said stud and connecting with aradial passage alignable with a passage in said support member, in acertain turned position thereof.

2. An eraser attachment for typewriters, comprising an eraser, a chainhaving said eraser mounted on one end threreona vacuum rubber cupmounted on the other end of said chain for engagement upon a smoothsurface of said typesaid radial air passage in a certain turned posiairpassage extending to the exterior of said' shank portion, said supportmember being formed with a radially extending passage alignable withtion of said support member to permit air to enter the hollow of saidcup to release the holding action of said cup.

3. In a device of the class described, a vacuum rubber cup forengagement upon a smooth surface, a stud molded into thematerialv ofsaid cup and having a projecting shank portion, a support memberrotatively engaged upon said shank portion, and an air passage extendingfrom the inner face of said cup through said stud into said shankportion and connecting with a radial air passage extending to theexterior of said shank portion, said support member being formed with aradially extending passage alignable with said radial air passage in acertain turned position of said support member to permit air to enterthe hollow of said cup to release the holding action of said cup.

4. In a device of the class described, a vacuum rubber cup forengagement upon a smooth surface, a stud molded into the material ofsaid cup and having a projecting shank portion, a support memberrotatively engaged upon said shank portion, and an air passage extendingfrom the inner face of said cup through said stud into 'said shankportion and connecting with a radial air passage extending to theexterior of said shank portion, said support member being formed with aradially extending passage alignable with said radial air passage in acertain turned position of said support member to permit air to enterthe hollow of said cup to release the holding action of.said cup, saidsupport member being threadedly engaged upon said shank portion forpermitting said support member to be rotated upon said shank portion toalign said radial air passages.

' FREDERICK WILLIAM STOUT.

